Augustus g



(No Model.)

A. G. GHRISTMAN.

, PLOW.

No. 275,354. Patented Apr. 10;18 8 3.

PETERS. mlo-um m mr. Waihinglm D u UNITED STATES PATENT ()FFICE.

AUGUSTUS Gr. OHRISTMAN, OF LITIZ, PENNSYLVANIA.

PLOW.

SPECIFICATION forming part of Letters Patent No. 275,354, dated April10, 1883.

Application filed September 16, 1882. (No model.)

To all whom it may concern Be it known that I, AUGUSTUS G. Oniusr- MAN,a. resident of Litiz, county of Lancaster, State of Pennsylvania, haveinvented a new and useful Improvement in Plows, of which the followingis a specification.

This improvement relates more particularly to the jointer-bar head andjointer-standard connected therewith and the object of the invention isto give facility of adjustment to the standard and an immunity frombreakage, while not interfering with the use thereof.

Referring to the drawings, forming part of this specification, in whichcorresponding parts are'similarly lettered, Figure 1 represents a plowwith my improved jointer attached. Fig. 2 represents the jointerdetached from the plow, in side and front elevation, and upon anenlarged scale. Fig. 3 is a plan of the jointer; Fig. 4, a sectionthrough the jointer-bar head and standard on the line 00 a: of Fig. 2,also details of the friction-buttons.

A represents the plow, which is a double standard of my Patent No.254,543, March 7, 1882.

B is the improved jointer-bar, provided with a head, B, V-guides Btransverse slots B and stops B for the buttons.

(J is the jointer mold-board standard,its rear face adapted by a groove,0, and a corresponding face width tomatch with the head B and its guidesB and to slide upon the same, the mold-board being secured to thestandard, as usual, by bolt 0 Buttons D D are strung upon a bolt, D anddropped into the transverse slots B of the jointer-bar head. Thesebuttons, which I term friction-buttons, have ofl'sets D at one end,which project in from the side face of the jointer to the central web ofthe same, and have a female groove, D cut in the offset to fit upon themale stop B of the head, the jointer-standard resting against the facesof the bar-head. The friction-buttons are set with their ends D over thestops B, and the bolt D screwed up until the standard will beautomatically held by the grip of the buttons. It may then be adjustedto the desired height upon the bar, a few turns given to the nuts, andthe jointer will be held firmly in place with sufl'ieient rigidity to doits proper work; but should an obstruction be met, practicallyunsurmountable, the standard 0 will slip out of the friction buttons D,and the moldboard E,withthestandard O.remainunharmed.

The improved jointer-head is applicable to any bar used upon eithersingle or double standard plows, and its application will in all casesprove profitable where a jointer is used upon a plow.

The drawings and description are so detailed that an expert can readilyunderstand the same, and will not require any further elucidation. I

I desire therefore to secure by Letters Patent the following claims:

1. The improved jointer-bar B, adapted to be applied to double or singlestandard plows, and provided with a head, B, having longitudinal guidesB transverse slots B and stops B, in combination with ajointer-standard, G, and friction buttons D, substantially as shown, andfor the purpose described.

2. The standard O of a jointer mold-board, adapted, by female groove 0and faces parallel therewith, to contact with the jointer-bar head, andadjustable thereon, in combination with the same and friction-buttons D,whereby the position of the standard is maintained,sub-

A. G. GHRISTMAN. Witnesses:

JEFF. SNYDER, T. O. YARINGTON, Jr.

